Sen was pushed onto the track around 8 p.m. at the 40th St./Lowery St. elevated station in Queens by a woman in her 20s. Witnesses say that she was mumbling to herself and as the train approached, pushed the man, then fled the scene. She was seen by a surveillance camera and police have released the footage.

“He was a nice and quiet and very good person,” his roommate, Ar Suman, told the Daily News. “Seven days a week he worked. He wanted to be his own boss.”

Just six months ago, he finally accomplished his dream when he opened the New Amsterdam Printing Co. in Manhattan.

“He was very excited to have his own business,” Suman added. “His goal was to have his own business.”

Police initially said that Sen was not carrying identification. Police Commissioner Ray Kelly said they identified him thanks to “information on his person and info called in.” Investigators did find his laptop and wallet at the scene, sources told the Post.

“We’re still investigating. There were some witnesses on the platform. We’re getting some hotline tips,” Kelly explained, the Post reports. “We’re reasonably confident that we’ll identify the suspect. We are properly deployed in transit areas.”

This is the second death at a New York station this month, following the death of Ki-Suk Han on Dec. 3. Still, Mayor Michael Bloomberg assured New Yorkers that the transit system is still the safest in the world.